Home / 28,690.90-39,561.54-19,617.76

Finding the Fourth Proportional to 28,690.90, 39,561.54 and 19,617.76

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Solution

The fourth proportional to 28,690.90, 39,561.54 and 19,617.76 is: 27,050.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,690.90 : 39,561.54 = 19,617.76 : x
  2. Step 2: Convert to fraction form
    28,690.90/39,561.54 = 19,617.76/x
  3. Step 3: Cross multiply
    28,690.90x = 39,561.54 × 19,617.76
  4. Step 4: Simplify right side
    28,690.90x = 776,108,796.95
  5. Step 5: Solve for x
    x = 776,108,796.95/28,690.90
  6. Step 6: Final answer
    x = 27,050.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.